Weather Teletype Code

Prior to the use of computer-based communication systems, teletype was main medium for transmitting weather data, forecasts, and warnings. Weather information was typed on a teletype machine that produced a perforated tape coded with the data, forecast or warning. This tape could then be used on one or more teletype circuits to distribute the information. The image below displays the punchtape code. Many meteorologists and communicators could read this code directly from the tape.